Reverse light power...

[Crispy]

Looks good. I'm planning something like this on my burb but with a three way switch so I can have the lights off, turn on by the switch, or turn on automatically with the reverse trigger. That led probably makes a hell of a difference.

 

[78C10BigTen]

Looks good. I'm planning something like this on my burb but with a three way switch so I can have the lights off, turn on by the switch, or turn on automatically with the reverse trigger. That led probably makes a hell of a difference.

1200 lumens omfg it does lol i cheated it because i used a magnet mount to the underside of the hitch in case i have to remove it due to johnny law lol i needed that brightness to see through my 5% rear tint at night.

 

[Crispy]

Yea some cops will nag you for that. Its not cheating if it helps you stay out of a ticket. Did you use connectors so you can just unplug and pull the magnet

 

[78C10BigTen]

Yea some cops will nag you for that. Its not cheating if it helps you stay out of a ticket. Did you use connectors so you can just unplug and pull the magnet

Yup, i cheated there to because the package came with a battery pack so you can see how bright it is and i nipped the wires at the battery pack behind the plug and used them as my pig tails lol

 

[Crispy]

Good man! haha

 

[78C10BigTen]

Good man! haha

Good man or half assed man lol

 

[Snoots]

If it looks stupid but it works, it ain't stupid.

 

[78C10BigTen]

Hard to tell thru the 5% tint but it makes it alot easier to back up!

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[Snoots]

Cool! Glad you had success with it!

 

[SierraClassique]

i was going to add some auxiliary LED lights to come on when i go into reserve but was worried they would be too bright for other drivers in parking lots etc., so i added some auxiliary lights that i turn on with a switch. i don’t use them too often but a bonus is having the option to use them when fussing with a hitch or setting up a campsite.

all that said, i may still tap into the reverse wires, add some more auxiliary LEDs, and just aim them pretty far down so they aren’t blinding to others- we’ll see…

my jimmy is both my daily driver and hunting/camping rig, so have to find a balance on practicality vs. overkill.

 

[bucket]

i was going to add some auxiliary LED lights to come on when i go into reserve but was worried they would be too bright for other drivers in parking lots etc., so i added some auxiliary lights that i turn on with a switch. i don’t use them too often but a bonus is having the option to use them when fussing with a hitch or setting up a campsite.

all that said, i may still tap into the reverse wires, add some more auxiliary LEDs, and just aim them pretty far down so they aren’t blinding to others- we’ll see…

my jimmy is both my daily driver and hunting/camping rig, so have to find a balance on practicality vs. overkill.

You could run a 3-way switch. Then you would have your choice of ON whenever you wanted, or ON when in reverse, or OFF at all times.

 

[rusted nuts]

along this same line.

anyone know where the wire inside the cab is for the reverse lights? (putting in a floor shifter and need to add a reverse light switch. truck was a manual so no column shifter to pull it from)

Thinking Yours is on top of Transs.

 

[SierraClassique]

You could run a 3-way switch. Then you would have your choice of ON whenever you wanted, or ON when in reverse, or OFF at all times.

looks like i have some research to do! thanks

 

[Mark80K15]

On my 1980 GMC K15 manual 4-speed, I have the reverse switch out the left side of the trans, near the top/front. There are a pair of wires coming out, one green, one blue. Here they are from ST_352_80_1980_Chevrolet_Light_Truck_Wiring_CK_10_30_Only.pdf:

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They are circuit 24 (light green, Back Up Lamp Feed), and circuit 75 (blue, Feed, Ign. Sw. "On and Crank" Controlled - Fused). They proceed to the firewall and enter the cab. In my case I can trace them to a spot on the steering column, and then they seem to disappear into the harness that comes from near the steering wheel down to the inside cab firewall.

On the next page ST_352_80_1980_Chevrolet_Light_Truck_Wiring_CK_10_30_Only.pdf shows circuit 24 entering the cab (with 75), but then it splits off and exists the cab at the rear light system harness. It is one of 4 wires at that location (24 light green, 9 brown, 18 yellow, 19 dark green):

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That same page shows circuit 75 proceeding on it's own inside the cab and terminating at the fuse block at the "FUSE - TURN, BACK UP LAMPS":

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Can you please help me with a few questions?

1) When trans is in reverse, are reverse lights on only when ignition switch is in ON position or engine is running?

2) Does circuit 75 terminate in the back of the fuse block? Earlier in this thread @foamypirate showed a picture of the green/blue wires with a connector at the end. I don't know what vehicle that's from so I don't know if I should have the same connector on my truck. In his case the wires come out of the column... in my case the wires go into it, under wrap, and then I can't track them anymore.

3) If it doesn't terminate in the back of the fuse block, then where?

4) If it does terminate in the back of the fuse block, how can I use a multimeter to test if the trans switch and the wiring is good up to that point? Can I do that test without removing the fuse block?

I ask because I'm trying to diagnose non-responsive backup lights. I know there could be other problems as well, but right now I'm trying to diagnose only that part of the system described above.

Thanks,
Mark

​

 

[AuroraGirl]

On my 1980 GMC K15 manual 4-speed, I have the reverse switch out the left side of the trans, near the top/front. There are a pair of wires coming out, one green, one blue. Here they are from ST_352_80_1980_Chevrolet_Light_Truck_Wiring_CK_10_30_Only.pdf:

You must be registered for see images attach

They are circuit 24 (light green, Back Up Lamp Feed), and circuit 75 (blue, Feed, Ign. Sw. "On and Crank" Controlled - Fused). They proceed to the firewall and enter the cab. In my case I can trace them to a spot on the steering column, and then they seem to disappear into the harness that comes from near the steering wheel down to the inside cab firewall.

On the next page ST_352_80_1980_Chevrolet_Light_Truck_Wiring_CK_10_30_Only.pdf shows circuit 24 entering the cab (with 75), but then it splits off and exists the cab at the rear light system harness. It is one of 4 wires at that location (24 light green, 9 brown, 18 yellow, 19 dark green):

You must be registered for see images attach

That same page shows circuit 75 proceeding on it's own inside the cab and terminating at the fuse block at the "FUSE - TURN, BACK UP LAMPS":

You must be registered for see images attach

Can you please help me with a few questions?

1) When trans is in reverse, are reverse lights on only when ignition switch is in ON position or engine is running?

2) Does circuit 75 terminate in the back of the fuse block? Earlier in this thread @foamypirate showed a picture of the green/blue wires with a connector at the end. I don't know what vehicle that's from so I don't know if I should have the same connector on my truck. In his case the wires come out of the column... in my case the wires go into it, under wrap, and then I can't track them anymore.

3) If it doesn't terminate in the back of the fuse block, then where?

4) If it does terminate in the back of the fuse block, how can I use a multimeter to test if the trans switch and the wiring is good up to that point? Can I do that test without removing the fuse block?

I ask because I'm trying to diagnose non-responsive backup lights. I know there could be other problems as well, but right now I'm trying to diagnose only that part of the system described above.

Thanks,
Mark

​

my reverse lights (same year, same trans) work key on and engine running in reverse.
My wiring is just kinda.. hanging in the air under my make shift floor panel(i dont have a floor) and those wires you mention are probably included in th

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are these the wires you were talking about?

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this is what i meant btw lol